A study of mainly distance, displacement, speed, velocity,
acceleration, deceleration or retardation.
Kinemetics - Distance
Distance is a scalar quantity in which the length an object
traveled. S.I. unit for distance is metre (m).
Kinemetics - Displacement
Displacement is a vector quantity in which the length and the
direction between the starting and the ending point. S.I. unit
for displacement is metre (m). However, it can be both positive as
well as negative as it is a vector quantity. Negative measurement for
displacement just means that the object is moving in the opposite
direction.
Kinemetics - Speed
Speed is a scalar quantity of which distance traveled by an object
per unit time. The S.I. unit for speed is m/s. Speed = Distance / Time
Kinemetics - Velocity
Velocity is a vector quantity of which the displacement traveled by
an object per unit time. Velocity = Displacement / Time. The S.I. unit
for velocity is also m/s. However, it can be both positive as well as
negative as it is a vector quantity. Negative measurement for
displacement just means that the object is moving in the opposite
direction.
Kinemetics - Acceleration
Acceleration is the rate of change of increased velocity per unit
time. Retardation and deceleration is defined as rate of change of
decreased velocity per unit time. The S.I. unit for acceleration is
m/sē. Acceleration can be both positive as well as negative as it is
a vector quantity. Negative acceleration just means that the object is
decelerating or retarding.
Acceleration = (Final
Velocity - Initial Velocity) / Time Taken
a = (v - u)/t
u
- initial velocity ; v - final velocity
There are 4 important graphs that all learners need to know.
With a clear understanding of the 4 graph would help solving kinematics
questions.